You’re being asked to complete a test item analysis using Table 2. Follow these steps to
determine the Difficulty Index and the Discrimination Index.
1. After the students are arranged with the highest overall scores at the top, count the
number of students in the upper and lower group who got each item correct.
2. Determine the Difficulty Index by dividing the number who got it correct by the total
number of students.
3. Determine the Discrimination Index by subtracting the number of students in the lower
group who got the item correct from the number of students in the upper group who got
the item correct. Then, divide by the number of students in each group (in this case, there
are five in each group).
4. Record your responses for Questions 3-5 by completing the provided Table below.
Item # Correct (Upper
# Correct (Lower
After completing the computations, please answer these four questions based on your test item
1. Which question was the easiest? Why?
2. Which question was the most difficult? Why?
3. Which item has the poorest discrimination? Why?
4. Which questions would you eliminate first (if any) – why?
Write a two-page (2) reflection about how this exercise is or is not relevant to your practice.
Consider the purpose of collecting and organizing data, or if there are alternate methods that
would be equally or more relevant to your practice based on research.
Reflection Length Requirement: Two (2) pages not including the completed chart
Format Requirement: APA
Research Requirement: two (2) secondary outside resources should be cited in-text and in the
Reference Page (the articles provided in this unit do not count towards this requirement. You are
encouraged to cite them in your paper, yet they will not count towards the secondary resource
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